Question: When does John Ruskin marry Effie Gray?
Paraphrase: When did John Ruskin and Effie Gray get married?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q179126 p:P26 ?s . ?s ps:P26 wd:Q271543 . ?s pq:P582 ?value1 . ?s pq:P580 ?value2 }